Oil well rig



- Nov. 3, 1936.

W. B. FULTZ OIL WELL RIG Filed July 22, 1936 la loa 9a H 2 Sheets-Sheet 2 W. @Fmm INVENTOR.

Patented Nov. 3, 1936 UNITED STATES PATENT OFFICE OIL WELLRIG WilfordB.-Fultz, Graham, Tex.

Application July 22, 1936, ,Serial No. 92,032

5 Claims. (01. 255-11) The invention relates more particularly to cable tool rig employing the drop method of tools connected to a walking beam and utilizing an A- mast.

This invention isdirectedchiefiy to the arrangement of sheavepulleys and their. mounting as well as the disposition of the bull wheel and its mounting, whereby the bull wheel is located back of the mast and spools over a sheave mounted on horizontal angularly disposed shaft, the face of said pulley giving perfect alignment with the center of the well and at the same time, an alignment with the bull wheel shaft. The other sheaves are also arranged on said mast so that the face of the lower sheave may be nearly aligned with the center of the well, having to allow only for the thickness of the cable used. The uppermost sheaves have their axes centered directly over the center of the well and when a casing block is strung up it will hang directly over the center of the well. This permits the setting of easing with perfect alignment.

An object of this invention is to provide a rig of the standard type having an A-mast that provides proper alignment of the various sheave pulleys with the center of the well, and with the bull wheel in particular, which is located rearwardly of said mast, for even and efiicient spooling.

A further object of having a rig in which the three sets of sheaves are aligned with respect to the well is to enable an operator to use each of the lines without having to shift the mast with guy lines or without his having to use an auxiliary mast as has been necessary heretofore.

The invention furthermore provides an oil well rig which is compact, easy of operation, the parts of which are readily accessible for repair, and which may be readily assembled or disassembled in units for moving.

While the drawings illustrate a preferred embodiment of the invention, it is to be understood that in adapting the same to meet specific needs and requirements, the design may be varied and changes in the minor details of construction may be resorted to within the scope of the invention as claimed, without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawings hereto attached, in which:

Figure 1 is a side view of an oil well rig illustrative of an embodiment of the invention.

Figure 2 is a front view, parts being omitted.

Figure 3 is a top planview the derrick being in section. I l V Figure l is an enlarged detail sectional view on the 1ine-,4-4 of Figure 1. l Corresponding and like parts are referred .to in the following description and designated in the several views of the drawings by like reference charaeters. I, I,

An A-mast and operating parts are appropriately mounted upon a suitable foundation. The posts 6 are tubular and are upwardly converged and connected by girts 1 and braces 8 to form a sturdy and strong mast. A casing sheave shaft I2 is mounted at the top of the mast and receives a plurality of sheaves l3 over which the 5 casing cable I! passes. Guy lines l4 steady and brace the mast in the usual manner. Truss braces 45 and struts 41 strengthen the mast in the accustomed manner. Clamps 9 and 9a, shown in detail in Figure 4, are attached to the upper ends of the posts 6 and support shafts Ill and Illa, the shaft Illa.- being horizontally disposed at an angle with respect to posts 6 of the mast, as indicated in Figure 4, and receiving a sheave Ila over which passes the drilling line or cable l6. Sheave II is larger than sheave Ha. to offset the angular disposition of mast 6. The shaft I0 is seated in notches formed in the clamp 9 and is retained in position by bolts 52 and coacting plates. The posts 6 comprise sections which are connected by clamp 46.

The numeral 2! indicates the casing of a well and IS the drilling tools. The Sampson posts 22 are of A construction and mount the walking beam 23 which is connected by pitman 24 with crank 25 rotatable with the shaft 26a upon which the band wheel 26 is secured, a drive belt 35 connecting the band wheel with the drive pulley .of a motor 36 or other source of power. The bull wheel 21 is connected by a short drive belt 33 with 40 the shaft 26a, thereby obviating the necessity of having belting across the derrick floor. A calf wheel 28 is connected by drive belt 37 with the shaft 26a. The bull wheel 21 coacts with the cable l6 which is adapted to be wound thereon. The temper screw 34 is carried by one end of the walking beam. The casing line I! coacts with the calf wheel 28.

As stated, the rig shown is of. the cable tool type. The arrangement results in a true alignment of the center of sheaves I3 which results in a true alignment of casing block 20, so as tocenter said block over the well. The face of sheave Ila. is in direct alignment with the center of the well. This prevents the necessity of having to shift the mast to set casing. As result, the mast with this arrangement is more adaptable than other masts in general use. The rig, although not mounted upon wheels, may be easily and readily moved in units by reason of its compactness. The bull wheel is conveniently located beneath the Walking beam and is in alignment with vertical angularly disposed sprocket I la thus a right lay drilling line IS has a natural tendency to spool on bull wheel shaft which is aligned with said sheave. The control levers 49, 50, and 5| are conveniently located and suitably connected to the respective clutches 42, 38 and 49 for throwing the bull wheel, the calf. wheel, and the sand reel into and out of action, as required. By mounting calf wheel 28 within the A mast the stress is self contained.

Having thus described the invention, what I claim is:

1. In a well rig, a mast comprising posts, clamps bindingly engaged with the posts, and a sheave pulley shaft mounted on the clamps.

2. In a well rig, a mast comprising posts, clamps bindingly engaged with the posts and provided with notches, and a sheave pulley shaft mounted on the clamps and seated in the depressions thereof.

3. In a well rig, a mast comprising posts,

clamps bindingly engaged with the posts, a transverse shaft at the top of the mast and provided with sheaves, a second transverse shaft below said shaft and horizontally disposed at an angle, and a sheave on the angularly disposed shaft and out of. line with other sheaves, said sheaves being disposed to admit of cables passing th-ereover having their depending operating portions about in line with the well.

4. In a well rig, a walking beam mount of substantially A form, and a bull wheel within said mount and below the beam with the axes of the bull wheel and walking beam substantially in parallel arrangement.

5. In a well rig, a mast comprising posts, a shaft mounted upon the upper end of the posts and provided with a series of sheaves, clamps attached to the posts at the upper end thereof, a shaft mounted beneath the first mentioned shaft upon clamps which are bindingly engaged with post, said shaft being horizontally disposed at an angle, a lower shaft bindingly engaged to the post by clamps and carrying a sheave, cables passing over the sheaves on their respective shafts and having their depending operating portions about in line with the Well.

WILFORD B. FUL'IZ. 

